From: Charles Oliver Nutter <charles.nutter@...>
Date: 2009-02-15T03:47:14+09:00
Subject: [ruby-core:22090] Re: Dir.glob and duplicates?

Nobuyoshi Nakada wrote:
> Hi,
> 
> At Sat, 14 Feb 2009 16:35:30 +0900,
> Charles Oliver Nutter wrote in [ruby-core:22065]:
>> The spec MRI produces dupes for is:
>>
>> Dir.glob recursively matches directories with '**/<characters>'
>> at core/dir/shared/glob.rb:205
> 
> The pattern at line 204 is '**/*fil?{,.}*', which is equivalent
> to to Dir.glob('**/*fil?*')+Dir.glob('**/*fil?.*'), so
> "subdir_two/nondotfile.ext" matches against both.  That is,
> brace expansions needs attention to use.

I think the presence of duplicates is a glob implementation detail that 
should not be specified. Surely different implementations are going to 
produce difference results. I don't think we should specify when dupes 
are expected to occur, and glob's specification should either be "may 
produce dupes" or "will not produce dupes".

- Charlie